Dresden 2011 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 60: Quantum Information: Photons and Nonclassical Light 2

Q 60.7: Vortrag

Freitag, 18. März 2011, 12:00–12:15, SCH 251

Probability amplitudes of two-levels atoms beyond the dipole approximation — •Armen Hayrapetyan¹ and Stephan Fritzsche^2,3 — ¹Max-Planck-Institut für Kernphysik, Postfach 103980, D-69029 Heidelberg, Germany — ²Department of Physics, P.O. Box 3000, Fin-90014 University of Oulu, Finland — ³GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany

The interaction of a two-level atom with linearly polarized light is considered beyond the typical dipole approximation. Using an invariant approach for the Schrödinger equation, we derived expressions for the probability amplitudes that depend on both, the space and time coordinates of the varying light field. In this talk, analytical solutions for these amplitudes are presented and discussed in terms of the phase of the radiation field. These solutions are applicable for wavelengths larger or comparable to the size of the atoms. The population inversion is discussed in terms of the phase of the radiation.